Concrete-mixer.



M. H. REED.

CONCRETE MIXER.

APPLICATION FILED OCT. 29, 1910.

Patented Jan. 10, 1911.

2 SHEETS-$111211! l.

M. H. REED.

CONCRETE MIXER.

APPLIOATION FILED 001. 29, 1910.

Patented Jan. 10,1911.

2 SHEETS-SHEET 2.

Q il ifzzesse 4 Original application med September MATTHEW HOWARD REED, OI CHICAGO, ILLINOIS.

condemn-mime.

Specification or letters Patent. Patented Jan. 10, 1,911.

28, 1908, SerialNo. 455,101. Divided and this application filed 001:0- ber 29, 1910. Serial No. 589,809.

concrete mixers, for mechanically mixing concrete composed of the usual ingredients crushed stone, sand, cement and water, an

it has for its object to provide a construction wherein the concrete may be thoroughly mixed b the'rotation of a cylindrical drum provide with angularly arranged blades, means for receiving the ingredients at the lowermost portion of the front end, means for delivering the in redients into the interior and for vpreventin their return back- Wardly, means for disc arging the mixed product from time to time as made, togetherwith other features of construction as shall be more fully hereinafter set forth.

The particular object of the invention is to provide an apparatus into which the ingredients may be charged at the lowermost portion so as to avoid the necessity of wheelmg or hoisting thereinto from preliminary hoisting plat orms or by other hoisting means, as is usually necessary in devices of this class.

The present application; is a division of my former application for improvements in concrete mixers filed September 28th, 1908, Serial No. $55,101.

In the drawings which show preferred forms of the ap aratus; Figure '1 is a contral longitudina sectional view in normal position. Fig. 2 is an end view in elevation rom the front or receiving end. Fig. 3 is a similar view from the rear' or discharging end. Fig. 4 is a vertical sectional view on the broken line IV. IV. of Fig. 3, butshowing the discharge gate open. Fig. 4 is a similar .view on the line IV. IV. of Fig.

3 showing the gate operating mechanism in openosition. Fig. 5 is a horizontal sectional detai view on the line V. V. of Fig. 2. Fig. 6 is a detail view detached of a portion of the transverse partition, showing one of the segmental openings therein for discharge of the materia Figs. 7 and 8 are front and vertical sectional views res ectively,showin modified constructions em odyi'ng combine charging and protectin or mixing blades. lugs. 9 and 10 are simi ar views showing a further modified arrangement of the parts and a laterally enlar ed annular receiving f pocket for the materia 0 In the drawings 2 is the mixer drum or shellprovided at 1ts front end with an annular inwardly extending flange 3 formin opening concentric with the outer larger diameter of the drum, and constituting a front retaining wall, rovidin an annular pocket for receiving the ingre ients or material to be mixed.

4 is a chargin form extending rom the edge of said flange 3 at its lowermost portion, and adapted to receive the material as discharged thereinto and to convey it into said pocket, from any I suitable conveying apparatus as abarrow, supported on platform 5, incorporated with the general structure. As will be observed the platform 5 is substantially on a level with the lower edge of the drum, a particular advantage of the invention being that the drum may thus be mounted only sufficiently above the ground level to provide for the necessary framing, thusgreatly facilitating the access to the machme by the operator supplying the ingredients. The other end of the drum is closed by a head 6, preferably extendingentirely across the area exce t where open toprovide for outlet of the mixed material, as controlled by the outlet gates, hereinafter described.

Extending transversely across the area of the mixer drum near to and somewhat back from its front end, and forming if desired the rear wall of the receiving pocket referred to, is a partition 7 preferably provided with a central opening 8 for inspection of the interior, although saidopening may be dispensed with if desired. Sald partition 7 in the construction shown, is provided with a pluralit of radial openings 9 of segmental or 0t er suitable form as clearly shown in Fig. ,6, through which the its front end and having a central receiving chute or rest of suitable ingredients are discharged inwardly by the directing blades, to the mixing interior. 10 are charging blades extendmg angularly outwardly from said partitiomradially of in the rotation of the machine the material end at front and back. Pivotally mounted.

protecting blades similarly secured in partition 7 under the opposite side of the openings 9 and also to the shell of the drum. Said charging blades and protecting blades are so disposed, with relatlon to the partition 7 that they extend outwardly therefrom in opposite directions angularly toward the front and interior respectively, as clearly shown. The object of this construction is as the drum revolves in the direction of the arrow, and as the material is discharged into the peripheral pocket at the front through the charging chute 4, it will be enga ed successively by each of the charging b ades 10 at their lowermost position, carrled around and upwardly, falling by gravity inwardly and downwardly to the interior of the mixer. Protecting blades 11, traveling in the same manner will fend the material being mixed away from opening 10 at the lowermost portion, preventing its escape therethrough to the front and providing a clear receiving space for the successive charge of new material. J

The main interior eripheral Wall of the drum is provided wit any suitable mixing or carrying elements as one or more mixing blades 12 and one or more mixing plows 13,

so disposed an ularly across portions of the interior, exten ing outwardly from the walls and secured thereto, as to best facilitate thorou h admixture of the contents. As shown in the drawings, I have employed but one mixing blade 12 and one mixing plow 13, arranged substantially opposite each other, but it will be understood that the number and arrangement of these elements may be varied to suit different conditions of use, and that their depth, angularity, or

other features may be changed or modified as'desired.

For the purpose of discharging the mixed contents from time to time, I provide one or more discharge gates 14 adapted to open and close a discharge opening a through.

head 6, two such gates being preferably employed as shown in the drawings. Said gates are hinged upon a supporting cross bar 15 adjacent to the inner end of dischar' e chute b, from which they extend outward y angularly toward and bear against head 6 in normal closed position, (Fig. 1) so that will fall against the inner side of the gate and be mrown backwardly into the interior, thus facilitating the mixing operation. Gates 14 are adapted to be opened or closed from either end of the machine during its rotation, avoiding the necessity of stopping, by means of longitudinal rods 16, 16,-extending through rear head 6 and through the front cross bar 17 respectively, and provided with terminal grips 18, 19, one at each at 20, 20, to rods 16, 16, are links 21, 21,

blade or chute b formin char ed outwar gaging drawing the gates backwardly on their hinges and the front edges of mixinblade 12 and plow 13 respectively are pre rably. so located that a portion will receive and,

support the edge .or apart of the gate when opened and the material will be directed toward the discharge ate and opening by the mixing blades, as dlearly'shown in ig. 4. The hlnge 15 of each gate 14 is located adjacent to the inner end of the inclined gate part of the head 6 surrounding the disc arge opening, so

that when opened the gate 14 will deliver material from blade 12 to the said gate blade or chute, by which it is discharged from the machine. hen thus opened, it will be seen that the contents of the mixing chamber of the drum or a ortion of it, ma be disdly to the groun or an suita 1e receiving receptacle, after whici the gates may be readily closed and the operation continued.

The drum is rotated by any suitable means, as a driving inion or pinions 25, en-

a peripheral raclior racks 26 surroundmg the drum. Said racks may be separate or may-form a portion of the surrounding supporting band 27 carried on rollers 28 of the supporting framework, as will be readily understood. In Figs. 7 and 8 I have shown a modified construction in which the separate chargin blades and protecting blades are embodie in series of single blades 10 angularly'disposed around the front inner portion of drum 2 in a closely consecutive adjacent series. As shown the terminal corner of each of said blades 10 extends beyond the body portion of the next adjacent blade, which is angularly cut out as indicated at 29 for clearance of the entering material. The blades in such construction are somewhat wider than the singly acting blades, extending inwardl toward the center and for the urpose o bracing the innered es of the b ades and providing a bearing or the gate operating rods, one or more lon itudinal cross bars-17' are attached to t e inner edges of the blades, as shown. B

this construction, the material will be received within the front end of the shell back of the flange 3' and will be automatically carried around and delivered into the interior from which it can pass outwardly, due

arrangement of the with a diametrically enlarged annular "rellti seam

ceivin pocket 30 formed by radially extend head 31, a surrounding pocket drum 32 and a front retaining flange '3", as clearly shown in Fig. 10. The charging blades 10 and the protecting'blades 11'" are of substantially the sameconstruction as has .already been described as to the princi a1 figures of the drawings,exoe t that blaes'10 extend outwardly beyont the main'drum diameter-to the annularwalls of'the extended drum 32, thereby crossing the area of the pocket 30 radially at intervals. I The advantage of this construction is that the ingredients may be received at a still farther point from the center of the drum, lower than in the construction empl'oyin v a umformly strai ht drum, thereby ren erin it possible to c urge the machine even be ow the level of any ordinary platform, itsop eration being substantia already described.

The operation of the invention will be understood from the foregoin description. The discharge doors are norma 1y closed, the material is charged into the machine as has been described, at the lowermost portion of its receiving ocket, passing inwardly and undergoing tie mixing process,'being discharged from time to time as needed or when thoroughly mixed. The operation of the machine is rendered comparatively easy by the avoidance of any necessity for carrying the material up to a raised receiving chute, the machine itself operating to automatically receive the material at practically the ground level, and into its interior.

Theadvantages of the invention willfbe readily appreciated by all those familiar with this class of apparatus.

The invention .is com aratively simple in construction, cheap and not liable to'get out of order, and will operate continuously with-out attention.

Having described the invention, what I claim is: i

1. In a mixer, in combination, a revoluble drum, means therein to agitate and mix the material, a continuous series of circularly arranged charging pockets located at one end of the drum within its cylindrical Wall and closed at their outer ends, the open inlets of the pockets being turned toward the the same asthat axis of the drum, a circular head having its periphery contacting with the tops of the pocketwalls and set in from the adjacent end of the drum, and means to introduce material to the inlets of the pockets outside of said head.

2. In a mixer, in combination, a revoluble drum, means therein to agitateand mix the material, a. continuous series" of circularly arranged charging pockets located at one end of the drum within its cylindrical wall and closed at their outer ends, the open inlets of the pockets being turned toward the axis of the drum, n centrall apertured circular head having its perip ery "contacting with the tops ofthe pocket walls and set ln from the adjacent end of the drum, and

. means to introduce material 'tothe inlets ofthe pockets outside of said head.

3. A concrete mixer consisting of a rotatable drum having means therein to agitate and mix the material and a front annular receiving ocket, a transverse apertured partition set in from the front end of the drum, and an annular series of char ing pockets opening from the front annu ar 'reeeivin'g pocket through the partition to the interior ofthe drum. i v

4. A concrete mixer consisting of arotatable drum having means therein to a itate and mix the material and a front annu a'r receiving pocket, a transverse artition'set in from the front end of the rum-having radial o enings therethrough adjacent to the drum s ell, and an annular series of charging pockets formed by inclined blades incorporated with the front annular receiving pocket and adapted to discharge material through the annular openings of'the partition to the interior of the drum.

5. A concrete mixer consisting of a rotat-able drum having means" therein to agitate and mix the material and a front annular receiving pocket, 'a transverse partition set in from the front end of the drum hav-' ing radial openings therethrough adjacent to the drum shell, and a central opening, and an annular series of charging pockets formed by inclined blades incorporated with the front annular receiving pocket an adapted to dischar e material throu h the annular openings of the partition tot e interior of the drum. v

6. A concrete mixer consisting'of a rotatable drum having means therein to agitate and mix the material and an enlarged front annular receiving pocket extendin' laterally beyond .the periphery of the rum,"a transverse apertured artition set in from thefront end of-the rum, and an annular series of charging pockets 0 ening from the front annular receiving poc et through the partition to the interior'of the drum.

'7. A concrete mixer consisting of a rotatable drum having means therein to agitate and mix the material and a front annular inwardly extending retaining flange, a continuous series of circularl arranged charging pockets extending bac wardly from said retaining flange havin inlets opening-toward the axis of the rum and adapted to deliver material to the interior of the drum, and means to introduce material to the inlets of the pockets from outside the drum.

8. In a mixer, in combination, a revoluble drum, means therein to agitate and mix material, a continuous series of circularly arranged charging pockets located atone Ito its

end of the drum within its lindrica'l wall having open inlets toward t c axis of the drum, a circular head having its'periphery contacting with the tops of the pocket walls and set in from the front end of the drum, means to introduce material to the inlets of the pockets, and means for discharging the mixed material operable from eitherend of the drum.

'9. In a mixer, in combination, a horizontal revoluble drum'having a closed head at its discharge end, an opening and closing gate therein for retainmg or discharging the mixed material, a circular head set in from the front end .of the drum and divids ing the interior middle portion thereof from thefront portion, means wholly within the cylindrica wall of the drum and between said wall and the said head to receive the material beyond said head and introduce it y to the interior of the drum, and means in the interior of the drum to mix and lift the,

malter ial and carry it toward the discharge on v 10. In a mixer of the class described, a revoluble drum having a centrally openh'ead at its front outer end, a circular head set in from the said head and across the interior portion of the drum, material inlet devices peripherally arranged around said circular hea cylindrical wall ofthe drum and said front head and adapted to discharge material into the mterlor portion .of the drum, and means to charge material into said inlet devices from outside the drum.

' 1-1. The combination with the revoluble drum having an annular flange Y or head forming its front end, and an apertured disk set in from said front end, of a series of overlapping diagonally arranged blades se- ..of, overlapping diagonally arran edjblades forming chargin "pockets exten '11 backwardly from sai annular head, sai series of pocket. bladesltogether forming an .annular centrally open wall spaced backwardly from the'front centrally: open head to: the

-mixing compartment.

13. A rotary concrete mixing. receptacle having a front inwardly extending annular flange or centrally 0 en head anda continuous series of over apping diagonally arranged blades or gzvalls extending backwardly from said annular head having in ner terminal ends over which the material is delivered to the interior: mixing portion is delivered to the interior mixingl and exterior'thereto but within the many of said Qwalls being widened or extended inwardly toward the axis of the drum: at their inner portions.

'14. A rotary concrete mixin receptacle having a front inwardly exten mg annular flange o r centrally 0 en head and a continuous series of over appling dialgonally arranged blades or ,wa 5 extending backwardly from said annular head havmg nner terminal ends over which the materlal portion of the drum, said walls having e1r portions adjacent to the annular head of slightly less width than the distance from the edge of the central opening in the head to the eriphery thereof.

15. rotary concrete mixin receptacle having a front inwardly extendmg annular flange or centrally 0 en head and a continuous series of over ap ing diagonally ar- -ranged blades or' wa ls extending backwardly from said annular head having 1nner terminal ends over which the material is delivered to the interior mixin portion of the drum, said walls having t e1'r ortionsadjacent to the annular head of slig tly less width than the distance from the ed 6 of the central opening in the head to t e periphery thereof and their inner portions widened toward the axis of the drum.

16. A rotaryconcrete mixer drum havin a front inwardly extending flange or hea a transverse partitionset in from said flange and s aced inwardly from the perlphery of said rum to provide passageways for the material, and series of diagonall arranged charging blades secured to sai artltion, extending in front and backwar y there from res ectively in the same general direction and providin I passageways for the material from the out to the interior of the drum upon its rotation.

g 17. A rotary concrete mixing receptacle having a front inwardly. extendlng annular flange or centrally open head and a continuous seriesof overlappmg diagonall arranged charging blades spaced. apart om each other extending backwardl from said head and constituting an annu ar wall between the interior of the receptacle and its head, said blades having their ortions adjacent to the annular head ofgsllghtly less width than the distance from the-edge of the central opening in the head to the peri hery thereof to provide clearance for the de ivery end of a charging chute, and a char g chute extending backwardly over the out annular flange.

'18. A rotary concrete mixin receptacle having a front inwardly exten mg annular flan 'e or'centrally open head and a series of over apping dia onally arranged charging blades extendingdmckwardly from said ea having their inner portions widened toward the axis of the drum, and a charging chute III extending inwardly over the front annular flange and having its delivery edge lower than the edges of the inner portions of the charging blades.

19. In a mixer, in combination,;a revoluble drum, means therein to agitate and mix the material,. a continuous series of circu-- larly arranged charging ocketsoverlappingeach other and locate at one end only of the drum within its cylindrical wall and closed at their outer ends, the open inletsof the pockets being turned toward the axis of the drum, said pockets being "composed of a continuous series of diagonally arranged walls and ada ted to receive material from theexterior o the drum endwise and to deliver it over the ends of the pockets to the interior mixing portion ofthe drum upon rotation.

20. In a mixer, the combination of a revoluble drum provided with a centrally .aper-, tured head at its receiving end,a series of annularly arranged charging pockets overlapping each other and locatedat the receiving end only of the drum composed of diagonally arranged walls extending backwardly from said head and from the direction of rotation, and having inner widened terminal ends over which the material is delivered to the interior mixing portion of the drum, and a charging chute extendin inwardly through the lower portion 0 the apertured head having its inner edge located farther from the drum than are the inner edges of the pocket walls.

21. A mixer consisting of a revoluble drum provided with a centrally apertured head at its receiving end, a series of annularly arranged charging pockets overlapping each other and locatedat the receiving end only of the drum composed of diagonally arranged walls extending backwardly axial center of the i from said head and from the direction of rotation, the inner portions of the partition j walls extending inwardly toward the axis of the drum beyond the tops of the outer end portions of said walls, and having inner terminal'ends over which the material is delivered to the interior mixing portion-of the drum.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

MATTHEW HOWARD REED.

Witnesses:

( O. M. CLARKE,

CHAS. S. LEPLEY. 

